HAMED KAZEM HAMAD AL-KHAFAJI. The Effect of Differentiated Learning Method Learning to Collaborate in Learning Some Skills of Football And keep them . Modern Sport, [S. l.], v. 18, n. 3, p. 367–376, 2019. Disponível em: https://jcopew.uobaghdad.edu.iq/index.php/sport/article/view/1599. Acesso em: 10 may. 2025.